Modular equation is the equation in which modules of expressions that contain unknowns appear.
Examples of modular equation: |x| = 7 , |x + 6| = x + 6.
Example of resolution form:
|x + 2| = 4
Conditions:
x + 2 = 4 or x + 2 = – 4
Resolution: x + 2 = 4 → x = 4 – 2 → x = 2
x + 2 = – 4 → x = – 4 – 2 → x = – 6
S = {–6; two}
